title: [Influence of human activities on groundwater environment based on coefficient variation method].
abstract: Groundwater system in the plain area of Beijing can be divided into six subsystems. Due to the different hydrogeological conditions of the subsystems, the degrees to which human activities affect the subsystems are also diverse. In order to evaluate the influence of human activities on each subsystem, the first and second aquifer with relatively poor water quality were chosen to be the evaluating positions, based on the data of groundwater sampled in September, 2011. With respect to human activities affect index such as total hardness, TDS, sulfate and ammonium, variation coefficient methods were used to calculate the weight of each index. Then scores were obtained for each index with national standard as reference, and superposition calculations were used to gain comprehensive scores, finally the groundwater quality conditions were evaluated. Contrast analyses were used to evaluate the incidence of human activities with groundwater subsystems as evaluation unit and water quality partitions as evaluation factors. The results indicate that the influence of human activities on the first aquifer is greater than that of the second aquifer, the Yongding river groundwater subsystems and the Chaobai river groundwater subsystems are affected more than other groundwater subsystems.
authors.affiliation: Beijing Institute of Hydrogeology and Engineering Geology, Beijing 100195, China. zhaoweimsb@163.com
authors.forename: Wei
authors.initials: W
authors.lastname: Zhao
authors.forename: Jian
authors.initials: J
authors.lastname: Lin
authors.forename: Shu-Fang
authors.initials: SF
authors.lastname: Wang
authors.forename: Ji-Lai
authors.initials: JL
authors.lastname: Liu
authors.forename: Zhong-Rong
authors.initials: ZR
authors.lastname: Chen
authors.forename: Wen-Jie
authors.initials: WJ
authors.lastname: Kou
mesh_terms: D002681:China; D002947:Cities; D004784:Environmental Monitoring; D060587:Groundwater / Q000032:analysis*; D006802:Human Activities; D014874:Water Pollutants, Chemical / Q000032:analysis*; D060753:Water Quality
chemical_list: D014874:Water Pollutants, Chemical